In Chinese adult patients, Sun et.at have identified two heterozygous variants, c.C156A [p.Y52X] and c.C26A [p.S9X], in the DNAAF2 gene, leading to defects in the outer dynein arms and inner dynein arms, thereby resulting in PCD with the manifestation of male infertility [10]. This evidence concerns the gene DNAAF2 and primary ciliary dyskinesia.